Ring binder



FIG. 1 shows a top perspective view of the ring binder;

FIG. 2 shows a view from a first end of the ring binder;

FIG. 3 shows a top view of the ring binder;

FIG. 4 shows a view from a first side of the ring binder;

FIG. 5 shows a view from a second end of the ring binder;

FIG. 6 shows a view from a second side of the ring binder; and,

FIG. 7 shows a bottom view of the ring binder. 

The ornamental design for a ring binder, as shown and described. 